base64.go

package bug

import (
	"encoding/base64"
	"testing"
)

func TestWTF(t *testing.T) {
	assert := assert.New(t)
	url := base64.URLEncoding
	std := base64.StdEncoding

	cases := []struct {
		s string
		e *base64.Encoding
	}{
		// these fail...
		{"D4_a--1=", url},
		{"D4_a0-1=", url},
		{"D4_a__1=", url},
		{"D4/a++1=", std},
		{"D4_a0-9=", url},
		{"Finey-1=", url},
		{"Finey41=", url},
		{"Finey+1=", std},
		{"Finey+1+", std},
		{"Fineyo1=", url},
		// these work
		{"D4_a0-A=", url},
		{"D4_a0BA=", url},
		// more random ending in [1-9]=
		{"deadbe7=", url},
		{"deadb7==", url},
		{"deadbe==", url},
		// wait, 0= is safe...
		{"deadbe0=", url},
		{"deadAA2=", std},
		{"deadAA9=", std},
		{"deadaa9=", url},
	}

	for _, tc := range cases {
		b, err := tc.e.DecodeString(tc.s)
		if assert.Nil(err, "%#v", err) {
			s := tc.e.EncodeToString(b)
			assert.Equal(tc.s, s)
		}
	}
}